Wisconsin Republican Ron Johnson could put a monkey wrench into his party’s effort to give President Donald Trump his first big congressional win by the end of the year. Johnson has become the first G-O-P senator to come out against the party’s major overhaul of the federal tax code — and if two of the three uncommitted Republicans vote no, the party would not have enough votes to pass it. Johnson says the Senate version gives unfair treatment to “pass through” businesses in which owners pay taxes on their personal returns instead of corporate returns. Johnson used to own such a business, Pacur Plastics of Oshkosh — and reports say he still owns five-percent of it. Meanwhile, the House is expected to give approval today (Thursday) to a similar tax plan that would cut both personal and business tax rates, drop certain credits and deductions, and add one-point-five trillion dollars to future deficits.